/*
 * Copyright 2004-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package susano.common.util;

import java.math.BigDecimal;

/**
 * A utility class for {@link BigDecimal}.
 *
 * @author tanaka.akira.2006
 * @version $Id: BigDecimalUtil.java 337 2009-10-15 05:26:51Z tanaka.akira.2006 $
 *
 */
public final class BigDecimalUtil {

	private BigDecimalUtil() {
	}

	/**
	 * Converts the object to {@link BigDecimal}.
	 *
	 * @param o
	 *            the object
	 * @return the converted value
	 */
	public static BigDecimal toBigDecimal(Object o) {
		if (o == null) {
			return null;
		} else if (o instanceof BigDecimal) {
			return (BigDecimal) o;
		} else if (o.getClass() == String.class) {
			String s = (String) o;
			if (StringUtil.isEmpty(s)) {
				return null;
			}
			return new BigDecimal(s);
		} else {
			return new BigDecimal(o.toString());
		}
	}
}